一道连词的选择题Recycling wastes slows down the rate_____ we use up the Earth's natural resources.A.of what B.in which C.when D.at which

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一道连词的选择题Recycling wastes slows down the rate_____ we use up the Earth's natural resources.A.of what B.in which C.when D.at which

一道连词的选择题Recycling wastes slows down the rate_____ we use up the Earth's natural resources.A.of what B.in which C.when D.at which
一道连词的选择题
Recycling wastes slows down the rate_____ we use up the Earth's natural resources.
A.of what B.in which C.when D.at which

一道连词的选择题Recycling wastes slows down the rate_____ we use up the Earth's natural resources.A.of what B.in which C.when D.at which
回收废物降低了我们用尽地球自然资源的比率
选D at which which指代的是rate at rate 是以什么的比率

选D,这是固定搭配的